Bottom Bracket Spindle Collars

rickstrong

New member
Greetings All,

I'm sure this is a familiar theme. I have a 1986 Wicked Fat Chance, and as with many others one of the aluminum bottom bracket spindle collars has cracked. I had seen in a post several years ago that Rody Walter at Groovy Cycle Works sold replacement collars. Unfortunately, this is no longer the case. He suggested that I contact Chris Chance at the new Fat Chance website, and the support folks there suggested that I ask in one of the user groups :-/

Are there any sources of replacement collars or suitable substitutes?

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Jeeves

New member
I'm not aware of any alternatives, although it's a really simple part. I wonder if Rody would be willing to share the measurements? I'm sure a machine shop could crank these out at a reasonable price if we wanted to do a run.

-Raj
 

one piece crank

New member
The collar on my non-drive-side just split too. Bummer they are NLA.

However, back in the day, Cooks Bros used to offer BB's with a similar smooth spindle and collars. The cool set-up was to stack spacers on the drive-side, and use only one collar on the non-drive side. For the "factory" set-up, you would measure the non-drive-side spacing (as accurately as possible), then fit a spacer stack in place of the remaining collar. Viola - perfectly set-up, no-collar BB!
 
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mobius911

New member
I just installed the Ruland collars. They are indeed wider by 0.135". So between the two, they are over 1/4" wider. That essentially eliminates the ability to offset the spindle for chainline optimization.

The Rulands also have a larger OD and it appears that they may be able to contact the outer ring of the bearing- not a good thing. I'd be down for a set of remanufactured originals.
 

Mello Grello

New member
Okay, so I need collars too, so I quickly designed these ones up.

They use an M3 cap screw, ID is 17.05, OD is 31.8mm, and thickness is 8mm. There's a 2mm x 0.5mm shelf so that it only contacts the inner race.

What do you guys think, design-wise? Does it need to be beefier?
 

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mobius911

New member
I like it. Only question is whether there is enough meat around the screw. You've designed it with a bigger OD so that should help.
 

one piece crank

New member
Easiest solution is to ditch the collars all together, and go stacked washers just like 1980's Cook Bros. bottom brackets. I just split a collar on my Wicked and this is exactly what I'll be doing...
 

one piece crank

New member
I finally suffered a double collar failure, so I ordered up some stainless precision washers to fill the gap. As mentioned above, back in the day this was an inside trick to avoid using collars and allow fine chain-line adjustment.
 

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